1 /* 2 * Atheros AR71XX/AR724X/AR913X specific prom routines 3 * 4 * Copyright (C) 2015 Laurent Fasnacht <l@libres.ch> 5 * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org> 6 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License version 2 as published 10 * by the Free Software Foundation. 11 */ 12 13 #include <linux/kernel.h> 14 #include <linux/init.h> 15 #include <linux/io.h> 16 #include <linux/string.h> 17 #include <linux/initrd.h> 18 19 #include <asm/bootinfo.h> 20 #include <asm/addrspace.h> 21 #include <asm/fw/fw.h> 22 23 #include "common.h" 24 25 void __init prom_init(void) 26 { 27 fw_init_cmdline(); 28 29 #ifdef CONFIG_BLK_DEV_INITRD 30 /* Read the initrd address from the firmware environment */ 31 initrd_start = fw_getenvl("initrd_start"); 32 if (initrd_start) { 33 initrd_start = KSEG0ADDR(initrd_start); 34 initrd_end = initrd_start + fw_getenvl("initrd_size"); 35 } 36 #endif 37 } 38 39 void __init prom_free_prom_memory(void) 40 { 41 /* We do not have to prom memory to free */ 42 } 43